Two-stroke cycle combustion-engine.



K SCHWARZ. TWO STROKE CYCLE COMBUSTION ENGINE.

Patented June 4, 1912.

AYPLIOATION FILED JAN.21,1911.

V v X WWI m I cover on the line D-E in Fig. 1, the line, A, B being extended through the right corresponding parts as shown onthc left tantra err KARL SGEIWARZ, OF NUREMBERG, GERMANY.

TWO-SThOKE CYCLE COMBU$TION-ENGINE.

Specification of Application filed. January 21, .1911. Serial No. 603,822.

To all whom it may concern: I

e it known that I, Kain. Scnwwnz, a citizen of the lthnpire of (lei-many, residing at Nuremberg, in thelhnpire of Germany, have invented a newand useful ihvo-Stroke tych? (oi1ibustion-l lngine, of which the fol-' lowing a speeit ration.

llxp'erience has shown, that large twostroke cycle combustion engines give better results, it several combustion chambers independent of one another are disposed in the cylinder, which combustion chambers are preterably made long and narrow. in order to keep the total length of the cylinder over a within reasonable limits, it. is absolutely necessary to so dispose these combustion ehai'i'ibers in radial planes as to each reach from the inside wall to a point without the inner periphery of the cylinder. Thereby, however, new dili'iculties are created in the construction of the cylinder, since the space atditposal. for the valves leading to the t'zombust-ion chan'ibers and for the parts operating the said valves is too limited. It wenld not be permissible to cut into the cylinder flanges for obtaining the said space without loosing-the necessary tightnessot the cylinder under high pressures.

lvly invention relates to improvements in cylinders for large two-stroke cycle combustion. engines, whereby the said ditliculties are avoided.

One improvement consists in tapering one or both ends of the jacketed cylinder and to shitt the flange for connecting the cylinder with the cover to a point between the end and the i'niddle ot the cylinder.

Another improvement consists in providing one or each cover with a. conical extension adapted to compass the tapering cylin dcr end and to come with its flange in contac; with the flange of the cylinder.

I will now proceed to describe my invention with reference to the accompanying drawing, in which- 7 v Figure 1 is a vertical longitudinal section of a vertical cylinder and the lower cover on line A, B, C of Fig. 2, the right half of both parts being shown as turned90 to the left. Fig. 2 is a cross section through the lower hand portion of the device to indicate the side Similar letters of reference refer to similar parts in both views.

In Fig. 1 only the lower tical cylinder a is shown, because the upper half may be constructed in any other known manner. As is clearly shown, the cylinder a provided with a jacket 71 for the cooling medium and with the usual outlet slots 0 has its lower end tapered on the outside and a flange 7.; 'ata convenient height above the lower end face. Consequently the lower cover f/ is upwardly extended so as to compass the tapered cylinder end and to come with its flange i in contact with the cylinder flange lf. The/cover g is here provided with two opposite combustion chambers '11 and in the same vertical central plane, the chambers being inclined an'd reaching from the conical inside-wall of the cover to a pointwithout; the inner periphery of the.

cylinder. 1 The cover is provided with a tubular connection 1 above eachcombustion chamber 6 and with a tubular connection 1.! in the axis of this chamber. The tubular connection is for the air-inlet valve and it will beablear after an examination of Fig. 1, that. it is possible to spare in the cover 9 suflicientfspace for the cover of the air-inletvalve chamber and for the parts operating this valve without making any recess in the two flanges i and whereby the tightness-of the cylinder under high pressures might be 1 destroyed. The tubular connectiond is of course for the injecting'device.

The construction described ot' the cylinder is particularly suitable forlarge vertical twostroke cycle combustion engines andpresents the ad vantage, that the stability of the engine is thereby consideral'ily increased. Of course the construction described can also be applied to horizontal and other engines. In this case both ends of the cylinder and-both covers may be of a similar construction.

I claim:

1. In a two-stroke cycle co-mlmstion engine, the combination with a jacketed cylinder having one end tapered on the outside and a flange a point. between its central portion and the end face, of a cover with a flange adapted to com'pass the tapered cylinder end and to come with its flange in half of the ver contact with the cylint'ler flange, said cover periphery of said cylinder whereby it is rendered possible to spare spaces 1n the cover for the air-inlet valves and the parts operating same Without cutting into'thc two two covers having each several long and narrow combustion chambers in radial planes extending from the inside wall to a point without the inner periphery of said cylinder whereby it is rendered possible to spare spaces in the'c'overs for the air-inlet valves and the parts operating same without cutting into the flanges.-

I 3. In a two-stroke cycle combustion engine, the combination with a jacketed cylinder having one end tapered on the outside and a flange at 'a point between its central portion and the end face, of a cover with a flange adapted to compass the tapered cylinder end and tocome with its Large in contact with the cylinder flange, said cover having several long and narrow combustion chambers in radial planes, which chambers are inclined to the cylinder axis and'extend from the inside wall to a point without the inner periphery 01 said cylinder, saidcover having also tubular connections for the injecting devices in lin with and tubular connections for the airinlet valves at right angles to the combustion chambers, whereby space is obtained for the parts operating the air-inlet valves without cutting into the two flanges.

4c. In a two-stroke cycle combustion engine, the combination with a jacketed cylirr der having its two ends tapered on the outside and two flanges between its central portion and the end faces, of two covers wit-l1 flanges adapted to compass the tapered cylinder endsand'tocome with their flanges in contact with the cylinder flanges, said two covers having each several long and narrow combustion chambers in radial planes which chambers are inclined to the cylinder axis and extend from the inside wall to a pointwithout the inner periphery 'of said cylinder, said cover having also tubular connec tions for the injecting devices in line with and tubular connections for the air-inlct valves at right angles to the combustion chambers, whereby space is obtained for the parts operating the withoutcutting into the flanges.

KARL SCI-IWABZ.

air-inlet valves 

